Systematic review with meta analysis of the epidemiological evidence relating smoking to COPD, chronic bronchitis and emphysema BMC Pulmonary Medicine Springer Nature Link Silent Airway Mucus Plugs in COPD and Clinical Implications CHEST Smoking cigarettes has long been proven to cause severe lung damage, including chronic obstructive pulmonary disease (COPD), emphysema, and lung cancer. Over time, cigarette smoke destroys lung tissue, fills airways with tar, Can E cigarettes help COPD patients quit smoking and reduce harm to lungs? COPD: Chronic Bronchitis vs. Emphysema COPD is an umbrella term that commonly includes chronic bronchitis and emphysema, two conditions with very different presentations. Chronic Bronchitis (Blue Bloater) Productive cough